Question 624381
What do you want to do here? Do you want to graph? If so, then use a graphing calculator to get 


{{{ drawing(500, 500, -10, 10, -10, 10,
 graph( 500, 500, -10, 10, -10, 10,0,(e^x-e^(-x))/(e^x+e^(-x)))

)}}}